Question # 1

The fibre which contains polymers of vinylidine chloride as fibre forming substance is known as

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saran fibre

nylon

polyester

acetate fibre

Raffinose is a trisacharirde composed of monosaccharide is

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Glucose

Glactose

Fructose

All

An amino acid exists in the form of Zwitter-ion Which has:

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one - ve charge

one + ve charge

two + ve carges

one + ve and one -ve

Ether show the phenomenon of

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Positional isomerism

Functional group isomeris

Meta merism

Cis trans isomerism

When a compressed gas is allowed to expand into a region of low pressure, it produce:

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Vapours

Cooling effect

Heating effect

None of above

The peptide bond is

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Glycine

Non-covalent bond

Weak bond

Responsible for secondary structure of protein

Chlorofluorocarbon, CF₂Cl₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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Which one is monosacharide?

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starch

glucose

maltose

sucrose

Which of the following protien is found in bone

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Keratin

Ossein

Mucin

Actin

The number of atoms in 0.004 g of magnesium is close to

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24

2 x 10²⁰

10²⁰

6.02 x 10²³

Mercury does not wet the glass because of

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repulsion

weak cohesive force

high viscosity

capillary action

The reactivity order of alkyl halides for a particular alkyl group is:

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F >Cl>Br>I

Cl>Br>F>l

l>Br>Cl>F

Br>l>Cl>F

Oceans cove ______ percent of the surface of the earth

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60

70

80

97

The product of addition polymerization reaction is

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PVC

Nylon

Terylene

Polyamide

The fourteen elements following actinium are known as

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Lanthanones

Lanthanides

Rare earths

Actinides

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Complete conversion of A to B has taken place

Conversion of A to B is only 50% complete

Only 10% conversion of A to B has taken place

The rate of transformation of A to B is just equal to rate of transformation of B to A in the system

Which one of the following elements is not present in all proteins

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Carbon

Hydrogen

Nitrogen

Sulphur

The vapour pressure of two liquids 'p' and 'Q' are 80 and 60 torr respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mol of Q would be

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140 torr

20 torr

68 torr

72 torr

Factors affecting denaturation of proteins:

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Change in temp and pH

Strong reducing agent

Strong oxidizing agent

All of these

Molecules of High molecular weight usually greater than 10,000 are called:

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Macro molecules

Mega molecules

Poly molecules

Gega molecules

The formula of esters is

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What is going to replace the petroleum?

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Silica

Silicates

Silicones

Silicon

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